/*
 * Copyright (c) 2007, 2015, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
/*
 * Copyright 2005 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.sun.org.apache.xerces.internal.jaxp.validation;

import javax.xml.transform.stream.StreamSource;

import com.sun.org.apache.xerces.internal.xni.XNIException;
import com.sun.org.apache.xerces.internal.xni.parser.XMLInputSource;
import com.sun.org.apache.xerces.internal.xni.parser.XMLParseException;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;

/**
 * <p>Static utility methods for the Validation API implementation.</p>
 *
 * @author Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
 */
final class Util {

  /**
   * Creates a proper {@link XMLInputSource} from a {@link StreamSource}.
   *
   * @return always return non-null valid object.
   */
  public static final XMLInputSource toXMLInputSource(StreamSource in) {
    if (in.getReader() != null) {
      return new XMLInputSource(
          in.getPublicId(), in.getSystemId(), in.getSystemId(),
          in.getReader(), null);
    }
    if (in.getInputStream() != null) {
      return new XMLInputSource(
          in.getPublicId(), in.getSystemId(), in.getSystemId(),
          in.getInputStream(), null);
    }

    return new XMLInputSource(
        in.getPublicId(), in.getSystemId(), in.getSystemId());
  }

  /**
   * Reconstructs {@link SAXException} from XNIException.
   */
  public static SAXException toSAXException(XNIException e) {
    if (e instanceof XMLParseException) {
      return toSAXParseException((XMLParseException) e);
    }
    if (e.getException() instanceof SAXException) {
      return (SAXException) e.getException();
    }
    return new SAXException(e.getMessage(), e.getException());
  }

  public static SAXParseException toSAXParseException(XMLParseException e) {
    if (e.getException() instanceof SAXParseException) {
      return (SAXParseException) e.getException();
    }
    return new SAXParseException(e.getMessage(),
        e.getPublicId(), e.getExpandedSystemId(),
        e.getLineNumber(), e.getColumnNumber(),
        e.getException());
  }

} // Util
